Sunset Shimmer got a spanking from Princess Celestia to ease her guilt over the various things she's done over the years. Now it looks like she could pay it forward by helping Wallflower Blush with her emotional burden in the same way.
Sunset Shimmer still has a lot of guilt to sort through for her past actions with the help of Princess Celestia and some unorthodox methods that might leave Sunset unable to sit for a while.